Hypodermic syringe.



PATENTED AUG. 29, 1905.

vwemoc E. F. DEAN.

HYPODBRMIG SYRINGB.

APPLIOATIGH FILED MAY 11, 1904.

PATENTBD AUG. 291905. E. F. DEAN. HYPODERMIG SYRINGE.

APPLIOATION FILED MAY 11, 1004.

2 SHEETS-SHBET 2.

pnrrsn sfrafrns PATENT FFIQE.

HYPODERIVIIC SYFHNGE.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application fiieaMay 11, 1904.. semi No. 207,496.

T0 all whom t may concern:

Be it known that I, EDWARD F. DEAN, a citi- Zen of the United States ofAmerica, 'residing in the city and county of Denver and State ofColorado, have invented certain new and useful Improvements inHypodermic Syringes; and I do declare the following to be a fulLclear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,refererence being had to the accompanying drawings, and to the lettersof reference marked thereon, which form a part of` this specification.

My invention relates to improvements in hypodermic syringes of the classset forth in my application, Serial No. 196,620, filed March 4, 1904. f

My present invention consists of certain improvements on theconstruction set forth in the aforesaid application. In my improvedconstruction the container is normally closed by a thin washer beforethe needle is applied. The needle is mounted in a screw-cap and hasaninteriorly-pro j ecting part adapted to pierce the washer orvalve,thus opening the container to allow its contents to pass through theneedle as the syringe is operated. The follower of the device is alsoprovided with a spring whose extremities engage notches on the arms ofthe frame, whereby the follower may be locked in any desired position ofadjustrnent. Furthermore, the front part of the container of my improvedconstruction may consist of glass, to which is clamped arearwardly-extending collapsible portion lined with thin metal. In theoperation of the device the projection of the follower acts on the rear.collapsible portion to force the latter into the forward or glassportion of the container, whereby the liquid is ejected through theneedle. The collapsible portion of the container is clamped to the glassportion, the latter having a circumferential groove in the plane of theclamp, whereby a liquid-tight joint is formed between the collapsiblepart and the glass part.

Having briefly outlined my improved construction, as well as thefunction it is intended to perform, I will proceed to describe the samein detail, reference being made to the accompanying drawings, in whichis illustrated an embodiment thereof.

In the drawings, Figure 1 is an elevation of my syringe with the needleremoved. Fig. 2 is an elevation of the needle. Figs. 3 and 4 aresections of the construction shown in Figs. 1 and 2. Fig. 5 is a view ofthe complete syringe, the container and the needleholder being shown insection and the fol-J lower moved to engagement with the collapsishowingthe needle detached. Fig. 9 is a similar view showing the partsassembled. Fig. 10 shows the valve-washer, on a larger scale, previousto puncturing. Fig. 11 shows the valve-washer after it has beenpunctured. Fig. 12 is a view, on a larger scale, showing another form ofconstruction, the container being shown in section. Fig. 13 is a detailView of the clamping-ring and the frame-arms mounted thereon. Fig. 14 isan exteriorly-threaded metallic sleeve mounted on the neck of the glasscontainer. Fig. 15 is a detail view of the container.

The same reference characters indicate the same parts in all the views.l

Referring first to Figs. 1 to 11, inclusive, let A designate the body ofthe device considered in its entirety. A designates arms, to the forwardextremities of which is attached a part A2, composed of suitable rigidmaterial. Inserted in the part A2 is a collapsible bulb B, which extendsrearwardly beyond the part A2, while its forward extremity is connectedwith the container part A2 by means of a screw B, whose head clamps theforward extremity of the bulb against the forward extremity of the rigidpart A2. A nipple B2 is screwed upon the forwardly-protruding extremityof the screw B. This screw is hollow and its opening registers with anorifice B3, formed in the nipple. Between this orifice and the forwardextremity of the screw is placed a small flat valve C, which is normallyclosed IOO to prevent the escape of the contents of the container. Theneedle D is made fast in the holder D', having an interiorly-threadedpart D2. The rear extremity of the needle protrudes into' the part D2and is slightly elon-- to iit the arms A of thev frame, whereby theplate is free to slide easily on the frame-arms. This plate F isprovided with a forwardly-extending projectionF2, adapted to engage thecollapsible portion of the bulb and expel the contents of the containeras the follower is l, moved to the position shown in Fig. 6. Upon thefollower-plate F is mounted a spring G, whose extremities G engagenotches A3, formed in the arms A as the follower is moved forwardly.This spring is connected with the follower-plate by a screw GZ, wherebythe follower may be released to permit the return movement by turningthe spring-catch to disengage the notches of the arms A. Thecatch may beturned to the position shown by dotted lines in Fig. 7 or to any otherintermediate position, so that the extremities G of the spring will notcatch upon the notches A3.

In the form of construction shown in Figs. 12 to 14, inclusive, H is aglass container, approximately hemispherical, having a neck- H, uponwhich is cemented an exteriorly-threaded sleeve H2. To this sleeve isscrewed a nipple H3, which projects slightly beyond the neck H and thesleeve H2 and is provided with an orifice large enough to receive therear extremity of the needle. This orifice is nor-Y mally closed by thevalve-washer C until the needle is applied, as shown in Fig'. 12, whenthe washer is punctured to allow the liquid I to escape as the followeris actuated. The

rear extremity of the containerH is provided with a circumferentialgroove H4, to which is clamped the collapsible rearwardly-extending lpatl, having a lining J of very thin metal,

the circumferential flange H7, formed on the nipple H3, and acorresponding flange D4, formed on the needle-holder, is locatedapacking-washer H5, while a similar washer H6 is placed between thecontainer H and the iiangeA I-I7 of the nipple.

These features all unite to forrn a perfect fit and make a liquid -tightjoint.

Previous to using the syringe the container (whether of the form shownin Figs. 1, 3, 45, and 6 or in Fig. 12) is first filled with the serumto be used and the nipple B screwed to position, with the valve-washer Cin place. Then as soon as itis desired toy use the device the needle isapplied to the nipple, and as it is screwed thereon the rear extremityD3 punctures the valve-washer to permit the escape of the serum. Thepart C', punched out of the opening, is not cut from the washer, butclings thereto on one side, since the rear extremity of the needle isshaped to effect this result. Then as the follower is forced forwardlythe serum is driven out of the container through the needle in a mannerwell understood. v ,l The valve-washer C is preferably composed of thinnon-corrodible metal.

i Having thus described my invention, what I claim ishaving arearwardly-extending collapsible portion which the projection engages`as the.

follower is actuated, and a spring-catch mounted on the follower andwhose extremities are adapted to engage they notches of the frame-4 armsfor the purpose set forth. .y

3. In a hypodermic syringe, the combination of a container provided witha nipple, a

needle adapted to be connected with the nipple and having aninwardly-projecting part, and a valve-Washer normally closing ,theescape-opening of the container and consisting of thin material adaptedto be punctured by the inwardly-protruding extremity of the nee"-y dleas the latter is connected with the nipple.l

4. A hypodermic syringe provided with a collapsible portion lined withthin non-corrodible metal.

IOO

TIO

5. A hypodermic syringe provided with a l container having' a valvenormally closing its exit extremity, a nozzle adapted to be con-,

nected with the container and provided with an inwardly-projecting partadapted to puncn ture the valve when the nozzle is applied.

6. A hypodermic syringe comprising a conbetween the frame and follower,substantial] y IO tainer, a collapsible portion extending rearasdescribed. wardly from the glasscontainer when the bulb In testimonywhereof I alx my signature in is distelnded, and1 a, folllOovlvernounted in suit presence of two witnesses. 5 able re ation wit the u ban container an adapted to act on the collapsible bulb as the EDWARD FDEAN' follower is actuated, a frame connected with Witnesses: thecontainer upon which the Jfollower is slid- DENA NELSON, ably mounted,and an interlocking connection A. J. OBRIEN.

